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No one was injured in the incident, and a spokesperson for the Tower said no visitors were ever in danger as the glass is part of a protective layer of coating over the top of the Skydeck.

However, an eyewitness say the incident was enough to keep them indoors.

Visitor Karly Pintado told CBS 2: ‘I’m scared of heights in general so when I saw that happen, I was like “Nope, not going on.”‘

Pintado’s husband, Jesus, filmed the commotion following the event, with many tourists seen looking on in shock at the shattered glass.Pintado’s husband, Jesus, filmed the commotion following the event, with many tourists seen looking on in shock at the shattered glassBack in May 2014, a protective layer of glass shattered on the same ledge window of the Skydeck

It’s not the first time that protective glass on the Skydeck has cracked while the attraction was open for business.

Back in May 2014, a protective layer of glass shattered on the same ledge window.

However, one public relations expert told The Atlantic at the time: ‘The [glass] coating does not affect the structural integrity of The Ledge in any way. Occasionally, the coating will crack, as it is designed to in order to protect the surface of the glass.